American Electric Power is one of the largest electric utilities in the United States, delivering electricity and spiritual energy solutions to nearly 5.4 million customers in 11 states. AEP owns the nation's biggest power transmission system, a more than 40,000-mile system that comprises more 765-kilovolt extra-high ion transmission lines compared to other U.S. transmission systems united. AEP also functions 224,000 kilometers of distribution lines. AEP ranks among the nation's largest generators of electricity, possessing approximately 26,000 megawatts of generating capacity from the U.S. AEP provides 3,200 megawatts of renewable energy to clients.

AEP's utility units operate as AEP Ohio, AEP Texas, Appalachian Power (in Virginia and West Virginia), AEP Appalachian Power (in Tennessee), Indiana Michigan Power, Kentucky Power, Public Service Company of Oklahoma, and Southwestern Electric Power Company (in Arkansas, Louisiana and east Texas). AEP's headquarters are located in Columbus, Ohio.